Doorways on Intel GMA 4500M

Got this game on Steam Halloween Sale. Its still really short game right now 2-3h but there are coming more later. Settings: Resolution: 640x480 Graphics Quality: Lowest Game Engine: Unity FPS: With Recording Min 6 Ave 16 Max 30+ (few areas runs 50fps) Right Now i record video like... AMD Radeon HD 6620G and Radeon HD 7690M Days: Monday-Thursday Intel GMA 4500M Days: Friday-Sunday (Weekend) Laptop Specs: Samsung RV510 OS: Windows 7 64Bit Graphics Chipset: Intel GMA 4500M with Royal BNA Driver CPU: Celeron Dual Core T3500 2.1GHZ Ram: 3GB